Dynamic Memory Supported Operating System

[Oct 27,2010]
SP1 RC has released. In the Release Candidate, additional guest operating system is supported.

• Windows Server 2003 Web, Standard, (32-bit and 64-bit)
• Windows Server 2003 R2 Web, Standard, (32-bit and 64-bit)
• Windows Server 2008 Web, Standard, (32-bit and 64-bit)
• Windows Server 2008 R2 Web, Standard, (32-bit and 64-bit)

At this moment, i have tested Windows Server 2003 R2 Standard Edition.
Dynamic Memory work like a charm.

[July 13, 2010]
Thanks to Ben , Virtualization Program Manager- his blog mentioned about dynamic memory operating system support.
Here is some summary of his article:-
Only the following operating systems are supported with the beta release:

•Windows Server 2003 Enterprise & Datacenter (32-bit and 64-bit)
•Windows Server 2003 R2 Enterprise & Datacenter (32-bit and 64-bit)
•Windows Server 2008 Enterprise & Datacenter (32-bit and 64-bit)
•Windows Server 2008 R2 Enterprise & Datacenter (32-bit and 64-bit)
•Windows Vista Enterprise & Ultimate (32-bit and 64-bit)
•Windows 7 Enterprise & Ultimate (32-bit and 64-bit)

The final release of SP will include support for the following operating system

•Windows Server 2003 Web, Standard, Enterprise & Datacenter (32-bit and 64-bit)
•Windows Server 2003 R2 Web, Standard, Enterprise & Datacenter (32-bit and 64-bit)
•Windows Server 2008 Web, Standard, Enterprise & Datacenter (32-bit and 64-bit)
•Windows Server 2008 R2 Web, Standard, Enterprise & Datacenter (32-bit and 64-bit)
•Windows Vista Enterprise & Ultimate (32-bit and 64-bit)
•Windows 7 Enterprise & Ultimate (32-bit and 64-bit)